ChemicalBook CAS DataBase List 2,2',4,4'-Tetrahydroxybenzophenone

2,2',4,4'-Tetrahydroxybenzophenone synthesis

6synthesis methods

Product Name:2,2',4,4'-Tetrahydroxybenzophenone
CAS Number:131-55-5
Molecular formula:C13H10O5
Molecular Weight:246.22

Obtained (small amount) by melting a fluorescin chloride/sodium hydroxide mixture in the presence of a very few water at 230–240° for 2–3 h.

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Yield:131-55-5 82.1%

Reaction Conditions:

with hydrogenchloride in water at 20 - 100; for 6 h;Autoclave;Large scale;Temperature;

Steps:

1.3 EXAMPLE 1

Hydrolysis reaction: step up the reaction kettle was slowly added 10% hydrochloric acid 500kg, and stirred to dissolve the remaining solids in the autoclaveResidue, the hydrolysis reaction was heated to 100 4 hours, cooled to 20 , allowed to stand for two hours, large amount of solid precipitated, filtration, waterWash to give the crude product. The crude product was then dissolved in hot water, add active carbon, boiled 30min, filtered hot, cooling and crystallization,To give a pale green crystalline product 2,2 ', 4,4'-tetrahydroxy benzophenone (BP-2) 101kg, m.p. 199 ~ 200 , yield82.1%.

References:

CN105418396,2016,A Location in patent:Paragraph 0016; 0027; 0030

89-86-1 Synthesis